Man and His Symbols - Jung ed. by Joseph Campbell
It presupposes a pretty extensive knowledge of worldwide culture, mythology and history, but surprisingly little pre-requisite psychological knowledge.
The Stormy Search for the Self - Stanislav Grof
He is a little bit far out there, but one of the most easy to read of his books which details his views on transpersonal psychology, the psychedelic experience, archetypes, etc.
Read about Maslowe, but don't read Maslowe himself, he was a boring old man. The Portable Freud is a good compilation of Freud, as is On Humour.
The Crucible of Experience is a biography of R.D. Laing, who was a leading proponent of the anti-psychiatric and patients' rights movement. Another author to look into within this sub-genre is Thomas Szasz.
If you like developmental psychology try Vygotsky or Erickson, or go right to the master Piaget.
Most of my books are packed away from moving around so much, but I'll think about it for awhile and try and figure out a couple more good intro ones to recommend to you. I highly recommend you study psychology as it can be very enlightening and interesting, but if you plan on pursuing a career in it be prepared for graduate school and a whole lot of grief in the short term.
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EDIT: thought of a couple to add:
The Varieties of Psychedelic Experience by Houston and Masters. This book was published just as LSD was criminalized and deals with the author's first hand experience using the drug in clinical settings. The majority of the book is case studies, some of which are quite interesting. Its a good read.
Why are all the Black Kids Sitting Together in the Cafeteria? (can't remember the author) = great social psych book about racial relations, ingroup/outgroup distinctions, etc.
The Nurture Assumption (can't remember author) = this is an amazing book that looks at how much parents really influence the adult personality of their children. i would argue with some of the conclusions drawn, but i highly recommend giving it a read. it is done in a very conversational style.
if i had to urge you to just read one or two i'd suggest nurture assumption and either the jung or the grof. you'd get a perspective on some alternative takes on mainstream psychological practice which also detail the theories of the mainstream without denigrating them. jungian psychology is actually more widespread than many people believe. personality typing (introversion/extraversion, etc.) is mostly based on his concepts, as well as the idea of the collective unconscious, archetypes, and art therapy.
